(Phys.org)—Two unrelated and rare instances of orcas killing and eating other ocean creatures has been witnessed and documented—one off the coast of California, the other off the coast of Australia. In one incident, the action was caught by a drone pilot out for a day of fun—he captured video of an orca killing a sevengill shark that was subsequently passed around for consumption by several other orcas. In the second, a team of researchers studying orcas off Australia’s southern coast reported observing orcas capturing and killing beaked whales on four occasions. They have published their findings in a paper they have uploaded to the open access site PLOS ONE.